Perpetual-calendar device



G. F. HAHN.

PERPETUAL CALENDAR DEVICE.

APPLICATION FILED MAY 10, 1916.

1,334,03 1 Patented Mar. 16, 1920.

mu aw RIIIIIIII WITNESSES: I INVENTOR 6% Gab)" 17 251817271.

A llorneys GEORGE E. HAHN, or New YORK, N. Y.

PERPETUAL-CALENDAR Device.

' T aZZ whom it may concern: 7 Be it known that I, GEORGE 'F. HAHN, a

' county citizenot the United States, residing in the city of New York,borough of Manhattan,

vente a certain new and useful Perpetual- Calen'dar Device, of which thefollowing is "a specification. I

This invention is a perpetual calendar device, and the object of" theinvention is the provision of a calendar device which, while extremelysimple in construction, is adapted, by virtue of slight manipulations,to correctly and simultaneously show the dates of all the days of anymonth of the year.

A further object of the invention is the provision of a device of theclass described,

thestructure' of which is particularly applicable'for use in pen orpencil construction, whereby a person, using such pen or pencil,

is incidentally holding a calendar before him in convenient position tobe observed as occasion requires. The'invention is, therefore, whenincorporated 1n a pen or pencil structure, of great practical meritfo'rbookkeepers, clerks, and other persons who are required to frequentlyconsult a calendar in making'calculations incident to their work. Itsuse is, however, not limited to this field,

a calendar within ready access.

as it is advantageous for all persons to have As most people carry apencil at all times, they, by

having one embodying the present invention, derive the benefits of aunitary article adapted for adual purpose. Moreover, the last-mentionedobject is accomplished without unduly encumbering or otherwisecomplicating the construction of the pen or pencil.

Features of the invention, other than those specified, will be apparentfrom the hereinafter detailed description taken in "conjunction with theaccompanying draw-' in s. a V e I 11 the ,accompanying drawings I haveillustrated difierent practical embodiments of the invention, buttheconstructions thereinfshown-are to be understood as illustrative,

only, and not as defining the limits of the invention.

F igure 1 shows an elevatlon of the present H invention as adapted foruse on the cap of a fountaina'pen.

' *Fig'. 2 shows the cap of the fountain=pen and calendar device incentral section.

Specification of Letters Patent.

"A plication iilcd ma 10, 1916. serial m. 96,533.

and State of New York, have in-' Patented Mar. 16, 1920. v

vcntion to a pencil cap, saidcap being shown' half in section and halfin elevation. Figs. 4 and 5 show a modified form of the inventionwherein the cap shown in Fig. 5

is adapted to cooperate with the pencil shown in perspective in Fig. 4 wproduce the results desired. Fig. 6 is a section on line 6 6 of Fig. 5,and v v I v Fig. 7 shows the development of the sur face on which thenumbers designating the days of the month are printed or "otherwisedelineated. I S f As heretofore stated, the invention is particularlyadapted for employment in pen; I

or pencil construction, "and, accordingly, its

adaptation to this environment forms the illustrative showing in theaccompanying drawings. v v

In said drawings, and referring more particularlyto Figs, 1, 2 and 7,the invention is here shown as incorporated in the construction of a capA for a fountain-pen B. Pen B is of the usual form, but cap A isprovided near its base with an annular flange forming a shoulder a. Theportion of the cap ex tending from shoulder a to the closed end of thecap is cylindrical shape, and encircling said cylindrical portion is asleeve C which extends to the end of the cap and is adapted to be lockedagainst rotation thereon by means of a thumb-screw D, the shank (Z ofwhich threads'into the closed I end of cap A. When thumb-screw D isloosened, sleeve IC frnay be rotated at will, but may belocked'in anydesired position by tightening said thumb-screw. a p

Sleeve C is provided with seven lon'gitudi nally eXtendingslots or sightopenings 0, each of which is designated in accgordance with one dayofthe week, such as..F. 'for"' Friday, S for Saturday, $11 for Sunday,etc. Upon the cylindricahportion of cap A are printedor otherwisedelineated thirty-one consecutive numbers ranging from 1 tof31,inclusive, and ar ranged in fivesuperimposed rows, the first four rowsembodying seven numbers each, and the remaining numbers'jbeing in'thefifth row, The numbers are so arranged, that they are in alinement'bothVertically andhorizontally, as shown in Fig. 7 The relation betweensight openings 0 of'sleeve C and the thirty-one. consecutive numbers jprinted on the cylindrical portion of the cap Fig. 3 illustrates theadaptation of the inissues that, when saidsleeve i's' manipulate so thatone number shows through one sight appear 7 will show through openings0, but, sincethe dates of the different months do not always fall uponthe same day. of the week, itis necessary to properly manipulate thedevice to obtain the correct relation between the dates of the month andthe days of the week for any particular month of the year. may beaccomplished by rotating sleeve 0 so that number 1 printed upon thecylindrical portion of cap A will show through slot 0' corresponding tothe day of the week on which falls the firsti 'dayrof the month which itis desired to have the calendar record; 6. 9., April 1, 1916, falls upona Saturday,and, accordingly, to adapt the device to record the month ofApril, sleeve C should be turned so that the numeral 1 willshow throughthe aperture 0 delineated S (Saturday), Thishaving been accomplished, itwill be found that all of the dates of the month will beshown throughthe respective sight openings 3 in their proper relation to the days ofthe week.

, If the month of May were tobe shown, the

sleeve would be manipulated so that the numeral 1 would show throughtheopening designated m, since the first of May falls 'on a Monday." Inlike manner, any particular. month desired may be shown by a s1m-' :plemanipulationof sleeve C, and, in the j embodiment shown in Figs. I and2, this, as

, stated, may be: accomplished by loosening.

thumb-screw D toflallow of the rotation of the sleeve. After themanipulations desired have been 'inade, thumb-screwfllis again tightenedto lock the sleeve against inadvertent rotation.

,7 In Fig. 8, the'invention is shown as adapted for use on a pencil capof the ty'pe'generally formed from sheet metal. By virtue of theformation ofthese caps, a simplified construction IS POSSlblB over thatnecessary fol-use in fountain-pen c aps." Thus, a cap A" is shown asprovided" with a revoluble sleeve Q providedwith, a plurality of sightopenings 0 and secured tocap A by turning the edges 6 'oflthe sleeveinto annular channels a formed in cap A.

p The turned- 1n portlons e1 engage with channels rather tightly, sothat sleeve C" will not inadve'rt ently shift, but, by grasping thesleeve tightly, it may 'be readily manipulated to V 7 show through thesight apertures c the days of the month delineated upon cap A and atthat portion thereof which underlies sleeve C. i e

n Figs. 4,15; and. e, the invention is illustrated 1n itsadaptationdirectly to a pencil.

In the embodiment. shown, the .pen cil'E is with seven fiat. sides,corresponding This 'ner shown in Fig. 7, are the thirty-one consecutivenumbers, said numbers being posi: 13101166; directly upon the pencil.With a pencil so formed and marked is adapted to cctiperate a cap A alsoformed with seven flat surfaces, as shown in Fig. 6, and operable to fitover the end of pencil E. Cap A is provided with seven sight apertures cof sufficient length'to show the five rows of figures therethrough, andeach aperture of which is, as described'in the previous embodiments ofthe invention, designated in accordance with'the days of the-week.

The manner of manipulating the'form shown'in Figs. sand 5 issubstantially the same as that described relative to the other forms ofthe invention, With the exception that, because of theangular orpolygonal character of the cooperating penciland cap, the parts cannotbe rotated relative to one another,but, in making the manipulationsdescribed, cap A is removed from thefpencll and again positioned thereonin proper relationto' the dates of the month; 'Of course,

if'desired, the pencil'mightbe made circular and cap 32 might becorrespondingly formed, but it is preferable that the angu larconstruction be employed, as such conpocket.

It will be apparent, from the foregoing del scription, that the calendardevice of this invention may,'by slight manipulations, be madetocorrectly' disclose the corresponding days, and dates throughout anydesired month of the year. "Moreover, the construe tion is suchthat thedevice is of a perpetual character; that is to say, it may be used fromyear to year without necessitating any change in the numbers, butsimplyrequiring.

slight manlpulations to compensate for the variations in the dates onwhichfithe several days of the week fall. V a Q The invention,particularly when adapted to pen andipencil construction, is .of'greatutility, since, as hereinbefor'e; stated,fa person, using thep'encil orpen in the course of bookkeeping or other similar work,has directly inhis line of vision a calendar which willenable him to quicklyand readilyascertain such dates as, maybe desired, without the necessity. oflooking up at calendar pad, or,--1f such is not at. hand, of hunting forone. Theadvantages of this invention are, moreover, derived Withoutunduly en-. cumbering the'pen or pencil. In. the interest of ,clearness,the parts are shown inthe drawings on a somewhat enlarged scale, but,

in practice, they may be made much smaller so as not to appreciablyenlarge thei'parts of the pen or: pencil. j

It will, of course, be understood that the invention is not limited tothe specific struc tural characteristics shown, as these might be variedin adapting the invention to different environments, and that theinvention is to be understood to be as broadly novel as is commensuratewith the appended claim.

Having thus fully described the invention, what I claim as new, anddesireto secure by Letters Patent, is:

In a perpetual calendar device, a cap adaptedto fit over the end of apen or a pencil and having a pocket in one end thereof, to receive suchpen or pencil, numbers corresponding to the days of the week delineatedon the outer face of said cap in seven vertical parallel columns, ashoulder circumferentially of the cap, a sleeve surroundin the cap andseated on the shoulder thereo said sleeve being normally rotatable andprovided with parallel slots, to designate the days of the week inaccordance with the seven vertical columns of numbers on the cap, and'athumb screw threaded into the closed end of the cap, and adapted toengage with one end of the sleeve, for frictionally locking, the sleeveagainst rotation by forcing it firmly to its seat on the shoulder of thecap. V

In testimony whereof-I have signed my name to this specification.

v GEORGE F. HAHN.

